Method for pulping and papermaking by utilizing sweet sorghum stalk vinasse

Abstract

The invention discloses a method for pulping and papermaking by utilizing sweet sorghum stalk vinasse. The method comprises the following four steps: step 1, carrying out alcohol fermentation and distillation, namely crushing 16 tons of sweet sorghum stalks with a water content of 70% through a pulverizer, adding cultured yeast seed liquid according to a proportion of 15% (v / m), and carrying out alcohol fermentation and distillation to obtain 1 ton of ethyl alcohol with a mass fraction of 95% and 16 tons of hot vinasse with a water content of 80% and a temperature of 94 DEG C; step 2, directlyfeeding the hot vinasse into a millstone mill pulping machine for fiber separation and brooming with a disc milling interval being 0.002 m and a pulping concentration being 20% (w / w) so as to obtain14 tons of pulp with a water content of 85%; step 3, weighing 2.1 tons of waste paper pulp boards, defibering the waste paper pulp boards by using a defibering device, and then feeding the defiberingwaste paper pulp boards into a Valley beater for beating to a beating degree of 36 oSR so as to obtain 10.5 tons of pulp with a water content of 80%; and step 4, blending the vinasse fiber paper pulpobtained in the step 2 and the waste paper pulp obtained in the step 3 according to a ratio of 1: 1, and carrying out papermaking to obtain 4.2 tons of raw paper. The method is used for pulping and papermaking by utilizing the sweet sorghum stalk vinasse.

Description

technical field [0001] The invention relates to a method for making pulp and paper by using distiller's grains from sweet sorghum stalks. Background technique [0002] In today's rapidly growing population, rapidly decreasing arable land area, rapidly increasing car ownership, and increasing shortage of petroleum energy, the development of renewable new energy is particularly important. Under the call of national policies, the biofuel ethanol industry has developed rapidly. In order to meet the requirements of "not competing with people for food, not competing with food for land, and not damaging the environment", biofuel ethanol has been produced by the first generation of grain-based raw materials. Technology is developing rapidly in the direction of using "non-grain" as raw materials. Among them, sweet sorghum is a very valuable raw material. As a crop that harvests both grain and sugar, it has the characteristics of high photosynthetic efficiency, high biological consta...

AI Technical Summary

Problems solved by technology

[0004] Most of the traditional straw papermaking pulping methods need to strengthen alkali and other chemical agents to be prepared by high temperature and high pressure cooking. The pulp yield is low (about 30%), and the lignin, hemicellulose, fruit Glue etc. are dissolved in water, producing a large amount of dark night with extremely high COD and residual alkali

The technical difficulty of treating this kind of wastewater is high, the consumption cost is high, and the economic benefit of the enterprise is poor.

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